here r/nCr=(n-r)/nCn-r how it is possble because its true that nCr=nCn – InterviewSolution

1.	here r/nCr=(n-r)/nCn-r how it is possble because its true that nCr=nCn-r but how n-r=r as in numerator
Answer» here r/nCr=(n-r)/nCn-r how it is possble because its true that nCr=nCn-r but how n-r=r as in numerator

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